Cooling Mode; Setting Dhw Temperature Production - Ferroli OMNIA S HYBRID H 3.2 Installation, Use & Maintenance Manual

Indoor wall unit for split reversible hybrid heat pumps which can be combined with an outdoor dhw heater

Hide thumbs

Table Of Contents

Table of Contents

OMNIA S HYBRID H 3.2

Example 1:

T1Sh= 50°C

dT1Sh= 5°C

Texternal air = 5°C

In these external air conditions, the heat pump has an operating temperature limit (T1stop) equal to 65°C, so

Twoutmax (before switch-off) = minimum value between 65 and 55 = 55°C.

NB: the boiler may or may not start in integration to the heat pump based on the parameters set In the heat pump service menu. If there is a block due to a heat pump

alarm, the boiler will be activated to reach the same Twoutmax value which the heat pump should have reached, i.e. 55°C. When this value is reached, the boiler will

be switched off.

Boiler only operation with heat pump stopped due to operating limit reached:

Twoutmax (before the boiler is switched off) = T1Sh+dT1Sh+5°C

•

dT1Sh parameter which can be set under heat pump service menu (see "9.3.2 Heat pump service menu" on page 60).

Example 2:

T1Sh= 60°C

dT1Sh=15°C

Texternal air = 5°C

In these external air conditions, the heat pump has an operating temperature limit (T1stop) equal to 65°C, so Twoutmax (before the heat pump switches off) = lower

value between 65 and 75 = 65°C.

NB: the boiler may or may not start in integration to the heat pump based on the parameters set in the heat pump service menu. If the heat pump is blocked due to an

alarm or reaching the operating limits (in this case when T1 water temperature output from the unit = T1stop = 65°C), the boiler with either be already activated or will

be activated, in any case, to reach the value of Twoutmax = 60+15+5=80°C

11.5.2 Cooling mode

The cooling setpoint (T1Sc) can be modified by the user between 5 and 25°C via the display (see "DHW and system set point configuration" on page 50). The

Twoutmin minimum cold water temperature sent to the system before the heat pump is switched off is calculated as follows:

Twoutmax (when the heat pump switches off) = minimum value between T1Sstop and T1Sc where:

•

T1stop= maximum temperature allowed to avoid operating outside the operating limits (see "3.3 Heat pump operational limits" on page 20)

Example 3:

T1Sc=7°C

Texternal air = 25°C

In these external air conditions, the heat pump has an operating temperature limit (T1stop) equal to 5°C, so,

Twoutmax (before switch-off) = maximum value between 5 and 7 = 7°C.

Example 4:

T1Sc=7°C

Texternal air = 10°C

In these external air conditions, the heat pump has an operating temperature limit (T1stop) equal to 11°C, so,

Twoutmax (before switch-off) = maximum value between 11 and 7 = 11°C.

11.6 Setting DHW temperature production

The DHW setpoint (T5S) can be modified by the user between 30 and 60°C via the display (see "DHW and system set point configuration" on page 50). The hyster-

esis of the DHW heater set point (Dt5_On) can be modified (see parameter 9.6 of paragraph "9.3.2 Heat pump service menu" on page 60).

where:

Cod. 3542B230 - Rev. 00 - 02/2022

Table of Contents